All challenges

Recover the relative offsets of concentric lock rings from a Frontier-CS interactive source instance.

Recover the circular order of doors from Frontier-CS source data.

Pair chameleons with the same original color from hidden source metadata.

Recover a hidden bracket string through the original regular-substring query protocol.

Recover a hidden permutation using interactive pairwise bitwise-OR queries.

Recover a hidden binary slate string through the original Frontier-CS interactive machine.

Find the unique diamond index in a Big Prize source instance.

Recover a permutation from average-parity query source data.

Emit canonical impostor guesses for adaptive source cases.